IMO he wanted to move from his married life to his fantasy life. He wasn't sexually attracted to LH. Plus the nagging him about did he do this or that...did you get to work? Setting up internet safety so he would be a good boy
He couldn't get it up and felt emasculated with LH.
Watching




, sexting, prostitutes, interest in young girls....was the only time he felt like a man
Getting out of the marriage was the only way he thought he'd feel like a man
IMO his behaviors show he was unwilling or unable to fix his sex addiction. In some ways IMO he was trying to get her to divorce him. But LH will never do it. Marriage is FOREVER to her. UNLESS he was caught with a woman, then she'd takeCooper and leave JMO but
it terrified him thinking he'd be stuck in a sexless marriage....having to hide his secret life FOREVER
MOO he felt stuck.
If Cooper wasn't there the "glue holding them together" was gone too. He could leave and punish LH for emasculating him and threatening to punish him for wanting to feel like a man by taking his child